diff --git a/ucm2/common/pcm/split.conf b/ucm2/common/pcm/split.conf
index 80f23e6c..9ed2f956 100644
--- a/ucm2/common/pcm/split.conf
+++ b/ucm2/common/pcm/split.conf
@@ -326,7 +326,7 @@ DefineMacro.SplitPCMDevice {
 	If.0 {
 		Condition {
 			Type String
-			Empty "${var:__Device}"
+			Empty "${var:-__Device}"
 		}
 		True.Define.__Device "0"
 	}